Title: HHDSSC: harnessing healthcare data security in cloud using ciphertext policy attribute-based encryption

Authors: Dharavath Ramesh; Rashmi Priya Sharma; Damodar Reddy Edla

Addresses: Department of Computer Science and Engineering, Indian Institute of Technology (ISM), Dhanbad – 826004, Jharkhand, India ' Department of Computer Science and Engineering, Indian Institute of Technology (ISM), Dhanbad – 826004, Jharkhand, India ' Department of Computer Science and Engineering, National Institute of Technology, Farmagudi, Goa-403401, India

Abstract: The advancement of cloud computing has great impact on the medical sector. Due to its storage facility, e-healthcare has emerged as a promising healthcare solution for providing fast and immediate treatment to patients. The PHRs collected and outsourced in the cloud leads to security concern. The data outsourced in the cloud is no more under the direct control of the patient, hence data should be encrypted prior its storage. Existing works based on group signature require high amount of computation. Other issues like confidentiality of private data, efficient key distribution, scalable and flexible fine-grained data access, revocation and tracing the malicious user is yet to be addressed to maintain the integrity of the patients. In this manuscript, we propose EPOC-1-based multi authority CP-ABE which can trace and revoke the malicious user who leaks the real identity and confidential data of the patient without any storage overhead. This methodology of white-box traceability presented in this manuscript, traces the malicious user efficiently. The proposed scheme is validated with some existing policies and makes the healthcare domain more securable under the cloud setup.

Keywords: cloud data storage; personal health records; PHRs; CP-ABE; EPOC-1; traceability; accessibility revocation.

DOI: 10.1504/IJICS.2020.109480

International Journal of Information and Computer Security, 2020 Vol.13 No.3/4, pp.322 - 336

Accepted: 07 Mar 2018
Published online: 06 May 2020 *

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